KR920014357A - Inverter Microwave Control Circuit - Google Patents

Inverter Microwave Control Circuit Download PDF

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Publication number
KR920014357A
KR920014357A KR1019900022457A KR900022457A KR920014357A KR 920014357 A KR920014357 A KR 920014357A KR 1019900022457 A KR1019900022457 A KR 1019900022457A KR 900022457 A KR900022457 A KR 900022457A KR 920014357 A KR920014357 A KR 920014357A
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KR
South Korea
Prior art keywords
output
control
switching
reference level
unit
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KR1019900022457A
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Korean (ko)
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KR930011812B1 (en
Inventor
한경해
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이헌조
주식회사 금성사
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Priority to KR1019900022457A priority Critical patent/KR930011812B1/en
Publication of KR920014357A publication Critical patent/KR920014357A/en
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Publication of KR930011812B1 publication Critical patent/KR930011812B1/en

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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/64Heating using microwaves
    • H05B6/66Circuits
    • H05B6/68Circuits for monitoring or control

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Abstract

내용 없음No content

Description

인버터 전자레인지의 제어회로Inverter Microwave Control Circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 (가) 내지 (마)는 제1도에 따른 동작파형도, 제3도는 본 발명에 따른 인버터 전자레인지의 제어회로도, 제4도는 제3도의 동기신호발생부 및 삼각파발생부 상세도, 제5도 (가) 내지 (다)는 제3도에 따른 동작파형도, 제6도는 제3도에 따른 동작타이밍 설명도.2 is an operation waveform diagram according to (a) to (e), FIG. 3 is a control circuit diagram of an inverter microwave oven according to the present invention, and FIG. 4 is a detailed diagram of a synchronization signal generator and a triangle wave generator of FIG. 5 (a) to (c) are operation waveform diagrams according to FIG. 3, and FIG. 6 is an operation timing explanatory diagram according to FIG.

Claims (3)

입력전원(AC)을 정류부(1) 및 평활콘덴서(C1)를 통해 인가받는 승압트랜스(3)의 1차측을 스위칭구동부(7)의 제어를 받는 스위칭트랜지스터(Q1)를 통한 고속스위칭에 따라 그 승압트랜스(3)의 2차측을 통해 마그네트론(4)을 구동시키는 인버터 전자레인지의 제어회로에 있어서, 시스템저에마이컴(19)의 제어포트(P1)를 통한 제어출력에 따라 소프트스타트 제어릴레이(RY1)의 스위치를 통해 상기 입력전원(AC)을 상기 정류부(1)에 인가되도록 제어하는 소프트스타트회로(16)와, 상기 마이컴(19)의 제어포트(P1)출력에 따라 상기 평활콘덴서(C1)의 충전시간과 동일시간의 시정수지연 후 스위칭온타 임기준레벨(vref)출력을 하는 기준레벨출력부(17)와, 상기 마이컴(19)의 제어포트(P1)출력에 따라 상기 기준레벨출력부(17)의 기준레벨출력조건을 민들어주는 기준레벨출력제어부(18)와, 상기 미그네트론(4)에 흐르는 전류를 검출하여 정류 및 평활시키는 마그네트론전류검출부(11)와, 상기 마이컴(19)의 제어포트(P2)(P3)출력에 따라 상기 마그네트론전류검출부(11)의 출력의 분압저항값을 제어하는 스위칭제어출력변환부(15)와, 그 스위칭제어출력변환부(15)의 제어를 받는 상기 마그네트론전류검출부(11)의 출력을 기준값과 비교하여 그에 따라 상기 기준레벨출력부(17)의 출력레벨을 제어하는 스위칭온타임제어부(14)와, 상기 승압트렌스(3)의 2차코일의 출력을 인가받아 스위칭타임동기신호를 발생하는 동기신호발생부(12)와 그동기신호방생부(12)의 출력에 동기하는 삼각파를 발생하는 삼각파발생부(13)와, 그 삼각파발생부(13)의 삼각파와 상기 기준레벨출력부(17)의 기준레벨(vref)을 비교하여 그에 따른 구형파스위칭펄스를 발생시켜 상기 스위칭구동부(7)에 출력하는 스위칭펄스발생부(20)를 포함하는 구성으로 된 것을 특징으로 하는 인버터 전자레인지의 제어회로.According to the high speed switching through the switching transistor Q1 under the control of the switching driver 7, the primary side of the boosting transformer 3, which receives the input power source AC through the rectifying unit 1 and the smoothing capacitor C1, In the control circuit of the inverter microwave oven which drives the magnetron 4 through the secondary side of the boosting transformer 3, a soft start control relay according to the control output through the control port P1 of the microcomputer 19 in the system bottom ( A soft start circuit 16 for controlling the input power AC to be applied to the rectifier 1 through a switch of RY1 and the smoothing capacitor C1 according to the output of the control port P1 of the microcomputer 19. Reference level output section 17 for outputting switching on-time reference level (vref) after a time constant delay equal to the charging time of c) and the reference level output section according to the control port (P1) output of the microcomputer (19). Reference level output control to reduce the reference level output condition (17) 18, the magnetron current detector 11 for detecting, rectifying and smoothing the current flowing through the magnetron 4, and the magnetron current according to the control port P2 and P3 output of the microcomputer 19. The switching control output converter 15 for controlling the voltage divider resistance value of the output of the detector 11 and the output of the magnetron current detector 11 under the control of the switching control output converter 15 are compared with a reference value. As a result, a switching-on time controller 14 for controlling the output level of the reference level output unit 17 and a synchronization signal for generating a switching time synchronization signal by receiving the output of the secondary coil of the boost transformer 3 are generated. A triangular wave generator 13 for generating a triangular wave in synchronization with the output of the unit 12 and the synchronous signal generator 12, a triangular wave of the triangular wave generator 13, and the reference of the reference level output unit 17; Compare the level (vref) and generate the square wave switching pulse accordingly. The control circuit of the inverter microwave oven, characterized in that it comprises a switching pulse generating unit 20 for outputting to the switching drive unit (7). 제1항에 있어서, 기준레벨출력부(17)는 마이컴(19) 제어포트(P1)의 스타트제어신호를 저항(R18)을 통해 베이스에 인가받는 트랜지스터(Q12)의 콜렉터를 저항(R17)을 통한 후 피엔피트랜지스터(Q11)의 베이스에 연결함과 아울러 저항(R11) 및 콘덴서(C14)의 병렬접속을 다시 통해서 상기 피엔피트랜지스터(Q11)의 에미터와 공통으로 전원(V+)단자에 접속하고, 그 피엔피트랜지스터(Q11)의 콜렉터 출력을 저항(R14),(R15)를 통해 분압하여 기준레벨(vref)출력하도록 구성하여 된 것을 특징으로 하는 인버터 전자레인지의 제어회로.2. The reference level output unit 17 of claim 1, wherein the reference level output unit 17 receives the start control signal of the microcomputer 19 control port P1 through the resistor R18 to the collector of the transistor Q12 to the resistor R17. After connecting to the base of the PNP transistor (Q11), and through the parallel connection of the resistor (R11) and the capacitor (C14) again through the power supply (V + ) terminal in common with the emitter of the PNP transistor (Q11). And a collector output of the PNP transistor (Q11) is divided by the resistors (R14) and (R15) to output a reference level (vref). 제1항에 있어서, 스위칭온타임제어부(14)는 마그네트론전류검출부(11)의 출력을 저항(R11),(R12)를 통해 분압하여 접지콘덴서(C12)를 통해 상기 스위칭제어출력부(15)의 제어를 받아 비교기(OP12)의 반전입력단자(-)에 인가받은 후 비반전 입력단자(+)의 기준전압과 비교하여 그 비교기(OP1)의 출력을 저항(R13) 및 접지콘덴서(C13)를 통해서 상기 기준레벨 출력부(17)의 출력레벨을 제어하도록 구성하여 된 것을 특징으로 하는 인버터 전자레인지의 제어회로.The switching control output unit 15 of claim 1, wherein the switching-on time controller 14 divides the output of the magnetron current detector 11 through the resistors R11 and R12 to the grounding capacitor C12. After the control is applied to the inverting input terminal (-) of the comparator OP12, the output of the comparator OP1 is compared with the reference voltage of the non-inverting input terminal (+) and the resistor R13 and the ground capacitor C13. The control circuit of the inverter microwave oven, characterized in that configured to control the output level of the reference level output unit (17) through. ※ 참고사항 : 최초출원내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019900022457A 1990-12-29 1990-12-29 Control circuit of microwave oven KR930011812B1 (en)

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Application Number Priority Date Filing Date Title
KR1019900022457A KR930011812B1 (en) 1990-12-29 1990-12-29 Control circuit of microwave oven

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Application Number Priority Date Filing Date Title
KR1019900022457A KR930011812B1 (en) 1990-12-29 1990-12-29 Control circuit of microwave oven

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KR920014357A true KR920014357A (en) 1992-07-30
KR930011812B1 KR930011812B1 (en) 1993-12-21

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980067235A (en) * 1997-01-31 1998-10-15 김광호 Surge voltage generation prevention circuit
KR100313992B1 (en) * 1993-05-18 2002-02-19 구자홍 Circuit for controlling driving of inverter
KR100399135B1 (en) * 2000-07-27 2003-09-26 삼성전자주식회사 Microwave Oven and Control Method Thereof
KR100399134B1 (en) * 2000-07-27 2003-09-26 삼성전자주식회사 Microwave Oven

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102404892B (en) * 2011-10-10 2014-06-04 深圳麦格米特电气股份有限公司 Power supply soft start method of variable-frequency microwave oven

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100313992B1 (en) * 1993-05-18 2002-02-19 구자홍 Circuit for controlling driving of inverter
KR19980067235A (en) * 1997-01-31 1998-10-15 김광호 Surge voltage generation prevention circuit
KR100399135B1 (en) * 2000-07-27 2003-09-26 삼성전자주식회사 Microwave Oven and Control Method Thereof
KR100399134B1 (en) * 2000-07-27 2003-09-26 삼성전자주식회사 Microwave Oven

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